Obviously lost power with manifolds, but my headers were junk and this was easier. It pulls really well with a stock 383 magnum torque converter. Flashes to around 2700.
Set up the Mopar performance distributor to 22 degrees initial and 38 total. Lots of initial timing is key with this cam and low compression. It's very responsive. Nice lopey idle.
I have this almost same combo in my Gran Coupe. My timing specs are dead on with yours. 37 all in. Mine is a little lower on compression probably. Uncut 452s and thick MR. Gasket head gaskets. Thanks for sharing!